digitaldesign
New Member
I am trying to make the digital circuit for a 4-way traffic intersection and I am following the circuit below:
**broken link removed**
However, as per my understanding, this circuit will change the traffic lighting for any particular road after every second/clock pulse (i.e. green-yellow-red-green). However, I want to modify the circuit in the link to keep green on for, say, 9 secs, yellow for 3 secs, and red for 8 secs. Can someone suggest how I should modify the circuit to do this? Also, how would I add a down counter for the traffic light from green to red? Would I use 2 decade counters connected to the 555 timer in the circuit to do this?
Please attach circuitry needed if possible. Thanks again.
**broken link removed**
However, as per my understanding, this circuit will change the traffic lighting for any particular road after every second/clock pulse (i.e. green-yellow-red-green). However, I want to modify the circuit in the link to keep green on for, say, 9 secs, yellow for 3 secs, and red for 8 secs. Can someone suggest how I should modify the circuit to do this? Also, how would I add a down counter for the traffic light from green to red? Would I use 2 decade counters connected to the 555 timer in the circuit to do this?
Please attach circuitry needed if possible. Thanks again.